package edu.utn.tacs.grupouno.hibernateconfiguration;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class HibernateFilter implements Filter{

	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {

		HibernateProvider provider = null;

		try {
			provider = HibernateProvider.getInstance();
			provider.openSession();
			
			chain.doFilter(req, resp);
			
			provider.commit();
		}
		catch (Exception ex1) {
			if (provider!= null)
				provider.rollback();
		}
		finally{
			provider.close();
		}
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		//don't need to do anything here!
	}
}
